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<h1 class="topictitle1">Oracle Database Backup Fails and the Error Details Contain "RMAN-06059: expected archived log not found, loss of archived log compromises recoverability"</h1>
<div><div class="section"><h4 class="sectiontitle">Symptom</h4><p>The Oracle database backup job fails and the error details contain "RMAN-06059: expected archived log not found, loss of archived log compromises recoverability".</p>
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<div class="section"><h4 class="sectiontitle">Possible Causes</h4><p>Before the backup job is executed, the file system that stores backup log files is deleted. As a result, invalid log files exist on the Oracle host and the backup fails. (On DeviceManager, the file system whose name starts with L stores backup log files.)</p>
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<div class="section"><h4 class="sectiontitle">Troubleshooting</h4><ol><li><span>Log in to the Oracle database host.</span><p><ul id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_en-us_topic_0000001656760969_ul1983714162204"><li id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_en-us_topic_0000001656760969_li7258697580">If the Linux OS is used, use PuTTY to log in to the Oracle database host and run the <strong id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_b14682476107">su - oracle</strong> command to switch to user <strong id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_b1646874718106">oracle</strong>.</li><li id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_en-us_topic_0000001656760969_li1366015032013">If the Windows OS is used, log in to the Oracle database host as the system administrator.</li></ul>
</p></li><li><span>Run the following commands to access the RMAN:</span><p><ul id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_ul19454143574215"><li id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_li44549351422">If the Linux OS is used, run the following commands:<p id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_p363075015428"><a name="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_li44549351422"></a><a name="en-us_topic_0000002164597202_li44549351422"></a><strong id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_b154781158438">export ORACLE_SID=</strong><em id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_i86308505427">Instance name</em></p>
<p id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_p16630205014425"><strong id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_b1553717104312">rman target /</strong></p>
</li><li id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_li1991913252438">If the Windows OS is used, perform the following operations:<ol type="a" id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_ol124110408264"><li id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_li624120402267">Press <span class="uicontrol" id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_en-us_topic_0000002164597290_uicontrol11819941114510"><b>Win+R</b></span> to open the <strong id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_en-us_topic_0000002164597290_b1015191219408">Run</strong> window.</li><li id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_li161821338277">Enter <span class="parmvalue" id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_parmvalue122291222476"><b>cmd</b></span> and run the following commands:<p id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_p18919132511435"><strong id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_b4919142514320">set ORACLE_SID=</strong><em id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_i11919102574313">Instance name</em></p>
<p id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_p149191125144318"><strong id="EN-US_TOPIC_0000002164757002__en-us_topic_0000002164597202_b1191932510433">rman target /</strong></p>
</li></ol>
</li></ul>
</p></li><li><span>Run the following commands to verify and delete the invalid log files:</span><p><p><strong>crosscheck archivelog all;</strong></p>
<p><strong>delete expired archivelog all;</strong></p>
</p></li></ol>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000002164757014.html">FAQs</a></div>
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